An issue that many players have come across is the application error caused by the iw3mp.exe process. The error message simply says “iw3mp.exe has stopped working” Additionally, the game is known to crash quite frequently.
How to Fix Iw3mp.exe Error
Here are a few suggested solutions to fix this error. Depending on your blue configuration, you may choose one of the following methods to repair the error.

Method 1: Use Headphones When the Game is Running
You may do one of the following:
· Change default audio device to headphones and then play the game.
-Plug in a microphone or headphones into the microphone/headphone jack to play the game.

Open Control Panel.
Select Hardware and Sound.
Select Sound and then display the Recording tab in the Sound dialog box.
Right-click in the window and select the Show Disabled Devices option.
Enable Stereo Mix.
Click OK and exit.